Powershares Exchange Traded Fund Trust - Definitive materials filed by investment companies. (497)

POWERSHARES EXCHANGE-TRADED FUND TRUST

SUPPLEMENT DATED JULY 8, 2008 TO THE PROSPECTUS
DATED AUGUST 30, 2007 OF:

PowerShares Aerospace & Defense Portfolio
PowerShares Cleantech ^TM Portfolio
PowerShares Golden Dragon Halter USX China Portfolio
PowerShares Listed Private Equity Portfolio
PowerShares Lux Nanotech Portfolio
PowerShares Value Line Timeliness ^TM Select Portfolio
PowerShares Value Line Industry Rotation Portfolio
PowerShares Water Resources Portfolio
PowerShares WilderHill Clean Energy Portfolio
PowerShares WilderHill Progressive Energy Portfolio
PowerShares DWA Technical Leaders ^TM Portfolio

The PowerShares Cleantech ^TM Portfolio (the "Fund") is now offered pursuant to a separate prospectus. All references to the Fund in this prospectus are hereby deleted. To obtain a copy of the current prospectus for the Fund please call 1-800-337-4246 or visit www.InvescoPowerShares.com.

Please Retain This Supplement For Future Reference.

POWERSHARES EXCHANGE-TRADED FUND TRUST

SUPPLEMENT DATED JULY 8, 2008 TO THE STATEMENT OF
ADDITIONAL INFORMATION DATED AUGUST 30, 2007 OF:

The PowerShares Cleantech ^TM Portfolio (the "Fund") is now offered pursuant to a separate statement of additional information. All references to the Fund in this statement of additional information are hereby deleted. To obtain a copy of the current statement of additional information for the Fund please call 1-800-337-4246 or visit www.InvescoPowerShares.com.

Please Retain This Supplement For Future Reference.

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